Hypothermia (hi-poh-THUR-mee-uh) is a medical emergency that occurs when the body is exposed to cold temperatures and loses heat faster than it can produce it. A person is considered hypothermic when body temperature drops to 95°F (35°C) or lower. More to Know Hypothermia is dangerous because when body temperature is too low, the organs can't function properly. Without treatment, organ failure and even death can occur. Exposure to cold weather, and especially cold water, can lead to hypothermia. Babies and older people are at increased risk. Signs of hypothermia include constant shivering, confusion, clumsiness, drowsiness, slurred speech, and a weak pulse. Many people with hypothermia don't know they're in trouble because the symptoms appear slowly and affect their ability to think clearly. Keep in Mind Hypothermia can be prevented in wintertime by dressing appropriately for the weather and keeping skin dry. If you suspect someone has hypothermia, go to the emergency room or call 911. While waiting for help, you can move the person to a warm, dry location, remove wet clothing, and attempt to warm him or her with blankets. All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts. Back to Articles Related Articles How to Be Safe in Ice and Snow Winter is a fun time of year. But while you're out having fun, you have to know how to be safe. Check out our article for kids to learn how to stay safe in snow and cold weather. Read More Cold, Ice, and Snow Safety In ice and snow, accidents can happen easily. Find out how to keep your family safe - and fit - while the weather is chilly. Read More Frostbite and Frostnip You can help prevent frostbite in cold weather by dressing kids in layers, making sure they come indoors at regular intervals, and watching for frostnip, frostbite's early warning signal. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.